.pinglun{
    width: 100%;
    height: 100%;
    background: #fff;
    position: relative;
    display: flex;
   padding: 20px;
 
}
.pinglun input{
    width: 65%;
    height: 40px;
    position: absolute;
    top:500px ; left: 0;
    margin-left: 40px;
}
.pinglun button{
    width: 20%;
    height: 40px;
    position: absolute;
    top:490px ; left: 560px;
    background: #ccc
}
.jieshao{
    width: 100%;
    height: 500px;
    text-align: center;
}
.jieshao img{
    margin-top: 50px;
}